books.google.com - Presents more than one hundred cryptogrammatic puzzles, from simple Caesar ciphers to Null ciphers and Nihilist Transpositions....http://books.google.com/books/about/Cryptograms_and_Spygrams.html?id=FTB5iAHgH4cC&q=ADFGX+cipher&utm_source=gb-gplus-shareCryptograms and Spygrams